// This code is derived from jcifs smb client library <jcifs at samba dot org>
// Ported by J. Arturo <webmaster at komodosoft dot net>
//  
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
// 
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// Lesser General Public License for more details.
// 
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
using System;
using SharpCifs.Util.Sharpen;

namespace SharpCifs.Smb
{
    internal class NetServerEnum2 : SmbComTransaction
    {
        internal const int SvTypeAll = unchecked((int)(0xFFFFFFFF));

        internal const int SvTypeDomainEnum = unchecked((int)(0x80000000));

        internal static readonly string[] Descr =
        {
            "WrLehDO\u0000B16BBDz\u0000",
            "WrLehDz\u0000B16BBDz\u0000"
        };

        internal string Domain;

        internal string LastName;

        internal int ServerTypes;

        internal NetServerEnum2(string domain, int serverTypes)
        {
            this.Domain = domain;
            this.ServerTypes = serverTypes;
            Command = SmbComTransaction;
            SubCommand = NetServerEnum2;
            // not really true be used by upper logic
            Name = "\\PIPE\\LANMAN";
            MaxParameterCount = 8;
            MaxDataCount = 16384;
            MaxSetupCount = unchecked(unchecked(0x00));
            SetupCount = 0;
            Timeout = 5000;
        }

        internal override void Reset(int key, string lastName)
        {
            base.Reset();
            this.LastName = lastName;
        }

        internal override int WriteSetupWireFormat(byte[] dst, int dstIndex)
        {
            return 0;
        }

        internal override int WriteParametersWireFormat(byte[] dst, int dstIndex)
        {
            int start = dstIndex;
            byte[] descr;
            int which = SubCommand == NetServerEnum2 ? 0 : 1;
            try
            {
                descr = Runtime.GetBytesForString(Descr[which], "UTF-8"); //"ASCII");
            }
            catch (UnsupportedEncodingException)
            {
                return 0;
            }
            WriteInt2(SubCommand & unchecked(0xFF), dst, dstIndex);
            dstIndex += 2;
            Array.Copy(descr, 0, dst, dstIndex, descr.Length);
            dstIndex += descr.Length;
            WriteInt2(unchecked(0x0001), dst, dstIndex);
            dstIndex += 2;
            WriteInt2(MaxDataCount, dst, dstIndex);
            dstIndex += 2;
            WriteInt4(ServerTypes, dst, dstIndex);
            dstIndex += 4;
            dstIndex += WriteString(Domain.ToUpper(), dst, dstIndex, false);
            if (which == 1)
            {
                dstIndex += WriteString(LastName.ToUpper(), dst, dstIndex, false);
            }
            return dstIndex - start;
        }

        internal override int WriteDataWireFormat(byte[] dst, int dstIndex)
        {
            return 0;
        }

        internal override int ReadSetupWireFormat(byte[] buffer, int bufferIndex, int len)
        {
            return 0;
        }

        internal override int ReadParametersWireFormat(byte[] buffer, int bufferIndex, int len)
        {
            return 0;
        }

        internal override int ReadDataWireFormat(byte[] buffer, int bufferIndex, int len)
        {
            return 0;
        }

        public override string ToString()
        {
            return "NetServerEnum2[" 
                        + base.ToString()
                        + ",name=" + Name
                        + ",serverTypes=" + (ServerTypes == SvTypeAll
                                            ? "SV_TYPE_ALL"
                                            : "SV_TYPE_DOMAIN_ENUM") + "]";
        }
    }
}
